Plans - short animations with high production quality

I plan to develop some short animations, one minute, two at the most, developing everything for high production quality for screening. I have many ideas for short animations like this. With very short animations I can focus on the technicalities of production quality without the pressure of a longer project. They will be useful for my portfolio and showreel. I can then use the skills I develop with these for my bigger projects. Some of the questions about which formats to use for best quality can be quite complex.